Valve.



Nu. 7I5,578. Patented Dec. 9, |902.

W. HESTON.

VAL-VE.

(Application led July 21, 1902.)

(No Model.)

F' if f4 f I ZH frag/l, D J2 J,

I 'fc E 1 W K I d" ,D

fl f3 l J' f3 ,rl 7L J' I! f l 4 E b y al' "L' 2L/Z,

- y H .l Il U /L W/Ineoseg 1.67.1 07. m/M wmwm,

A @Y wmwfff gigli/:1449i F794@ UNITED STATES'l PATENT OFFICE. j

WILLIAM HESTON, AOF HOMESTEAD-,2 PENN SYLVANIA.A

VALVE.

SPECIFICATION forming part of Letters Patent N0. 715,578, dated December9, 1902.l l

. the following is a full, cleaigand exact descrip'- which issirnple andcheap at first cost, in,

tion, reference being had to the accompanying drawings. i v

This invention relates'toa valve or cock especially adapted for usewhere very high pressures are employed, the primary object of theinvention being to `provide a construction by means of which leakageunder any` circumstances may be prevented.v y

Another object of the invention is toy providea structure of thecharacter specified which wear of moving parts may be easily and quicklytaken up, and in which wearupon the valve-plug and its seat will beminimized, because the plug will be locked to its seat as wellwheu thevalve is opened as when it is closed.

The invention is more Vparticularly described hereinafter and may behere summarized as consisting of the combination of parts described inthe following specilication, as set out definitely in the claims. t

' In the drawings, Figure l isaside View of a valve embodying myinvention. Fig. 2` is a central longitudinal section thereof. Fig. 3 isa plan View of the valve withA the adjustable abutment in the yokeremoved. Figs. 4 and 5 are respectively face views of the cams in theirpreferred form, which serve to force the valve-plug to its seat.

Referring to the parts by letters, A represents-a casing having acentral conical well a, which servesas the seat ofthe conical valveplugB, which is titled thereto. This casing has-on opposite sides of thisvalve-seat two openings a a2 for the entrance and exit of the liuid. Thevalve-plug has a port h through it, which may by the turning of vtheValveplug be brought into alinement with these two openings do?, inwhich case the valve is opened, or into a position at'right angles tothe alined position, in which caseythevalve is closed. y

l A cap C closes the opening inthe top of the valve-casing, throughwhich the valvep1ug is inserted, and this cap has a properly-placedstuling-box through which the cylindrical Serial No.116,344. (No model.)

portion bo'f the valve-stem passes. This cap is preferably screwed intothe opening in the valve-Casin g. v v

D represents a yoke which is secured to the v valve-casing by thebolts Iand whichextends across the axial line of the valve-plug and at suchdistance from the stuffing-boxes may be necessary for the accommodationof the co'p,

erating cams by which the valve is crowded l against itsseat. Throughthat part of the yoke which is in axial line with the valve-plug' is avwith it, is the hub'yl of the operating-handle.

J ,and the lower face of this hub bears against the shoulder b5 ou thevalve-stem formed by squaring the same. The upper or outer face ot' thishub is provided withinclines or cam surfaces y2, which engage withcorresponding cam-surfaces h'onthe lower or inner face of the cam-plateH. In the preferable construction these engaging cam-surfaces on the huband cam-plate,respectively, are oppositely inclined from twodiametrically opposite points, k

substantially as shown. f

The valve shown `is'an ordinary straight-` way valve, which may beclosed by turning it ninety degrees from the position in which it isfully open. r

The parts having been assembled, the opl eration is as follows: When thevalve-is being closed by the movement of the handle, the movablecam-surfacesj2 -that is, those surfaces on the handlehub-so move'withrespect tothe non-rotating cam-surfaces h on the cam-plate H that thehigh points of each' engage with 'the low points of the other, andtherefore the valve-plu'gB is allowed tomove slightly from its seat. Asthe valve comes to its closed position the high points on saidcam-surfaces engage, whereby the valve-plug is forced down firmlyagainst its seat. This makes it absolutelyA impossible thatf there shallbe any leakage of the :duid past said valve and also that any sedimentshall deposit itself between the valve and its seat. If one now turnsthe handle in the reverse direction, the first movement of the movablecam allows the valve-plug to move from its intimate contact with itsseat and to be easily turned; but as the plug nears the open positionthe high parts of the cam-surfaces again engage, with the result thatwhen the valve is completely opened it is again crowded against itsseat. The result is increased durability, because it is practicallyimpossible that any sediment or impurity in the fluid shall find anylodgment between the-valveplug and its seat, either when the valve isopened or closed.

It is obvious that the thrustot' the movable cam-surface against thenon-rotating camsnrfaces is borne bythe adjustable abutmentplug Ereferred to, wherefore as the engaging cam-surfaces wear or as thevalve-plug and its seat wear one may by the adjustment of thisabutment-plug take up this wear, so that the valve will be opened orclosed, respectively, when the handle is in the usual and desiredpositions.

i K is a jam-nut screwing onto the projecting end of this abutment-plug,hymeans of which when the plug is properly adjusted it is immovablyheld.

Having described my invention, I claim* l. The combination of avalve-casing having suitable inlet and outlet openings, and, betweenthem, a conical valve-seat, with a conical valve fitted thereto andhaving a stem projecting out of the valve-casing, and a yoke secured tosaid valve-casing, oppositely-inclined cams secured to and rotating withsaid valve-steln, and a coperating camplate non-rotatably secured tosaid yoke, and having oppositely-inclined cams which coperaiivel yengage the oppositely-inclined cams secured to the valve-stem, the partscoperating to crowd the valve to its seat when the valve is open, andwhen it is shut, but to relieve said valve as it moves between saidpositions, substantially as and for the purpose specified.

2. The combination of a valve-casing having suitable inlet and outletopenings, and, between them, a conical valve-seat, with a conical valvefitted thereto and having a stem projecting out of the valve-casing, ayoke secured to said valve-casing and having an irregularly-shaped holein axial alinernent with the valve, a cam secured to said valve-stem, acam plate having an irregularlyshaped stem which is fitted into acorrespondinglyshaped hole in the yoke and which loosely embraces thevalve-stem, substantially as and for the purpose specitied. ,j

3. The combination ot' avalve-casing having suitable inlet and outletopenings, and, between them, a conical valve-seat, with a conical valvefitted thereto and having a stem projecting out of the valve-casing, anda yoke which is non-rotatively iitted into a hole in the yoke and whichloosely embraces the valve-stem, an adjustable abutment-plug adjustablysecured in said yoke and engaging the end of said cam-plate stem,substantially as and for the purpose specified.

4. In a valve, the combination of a casing .having inlet 'and outletopenings, and, be-

tween them, the conical valve-seat, a conical Valve-plug fitted to saidseat and provided with astem having first a cylindrical portion whichpasses through a stufng-box forming part of the valve casing, second asquared portion, and third a cylindrical end portion, a yoke secured tothe valve-casing and Vhaving, in line with said valve-stem, an openingwhose inner end is squared and whose outer end is cylindrical andscrew-threaded, a handle whose hub has a square hole fitted to thesquared part of the stem and whose upper face is provided withoppositely-inclined cams, a cam-plate which embraces the cylindricalportion of said Valve-stein and has, on its lower face, cooperatingcams, and has a squared stem projecting from its upper face into ,asquare hole in the yoke, and an abutment-plug screwed into thecylindrical opening in said yoke, substantially as and for the purposespecified.

5. In a valve, the combination of a valvecasing having a conicalvalve-seat and one inlet and one outlet opening communicating with saidvalve-seat, with a conical valve fitted to said valve-seat and having a,single port which when the valve is open establishes communicationbetween said openings, a valvestem rigid with the valve and extendingout of the casing through a stuffing-box, a yoke attached to saidcasing, a non-rotating camplate secured to said yoke and having on its`lower face oppositely-inclined cams, and oppositely-inclined cams rigidwith said valvestem and coperating with the cams first named to crowdthe valve to its seat when the valve is open and when it is shut, but torelieve said valve as it moves between said positions, substantially asand for the purpose specilied.

6. The combination of a valve-casing having suitable inletand outletopenings, and, between them, a conical valve-seat, with a conical valvefitted thereto and havinga stem projected out of the Valve-casing, ayoke secured to that side of the valve-casing through which saidValve-stem projects, a hub secured to and rotating with said valve-steinand having on its upper side oppositely-inclined cam-surfaces, and acam-plate adjustably secured to said yoke and having on its under sidecoperating oppositely-inclined camsurfaces,sub stanti-ally as and forthe purposes specified.

ln testimony whereof l hereunto aftix my signature in the presence oftwo witnesses.

' NVILLIAM IIESTON.`

Witnesses:

E. L. THURsToN, ALBERT H. BATES.

IOO

